[code-watcher] Add CodeWatcherMode option.

There are three option values:
- Disabled: module does nothing (wow).
- Remove: module removes matching messages and sends temporary message
          to instruct user what to do.
- Upload: module uploads detected code to configured Haste Server.

modules/CodeWatcher/Handler.cs

@@ -7,16 +7,22 @@ using Kruzya.TelegramBot.Core.Extensions;
 using Telegram.Bot;
 using Telegram.Bot.Types;
 using Telegram.Bot.Types.Enums;
+using West.TelegramBot.CodeWatcher.Options;
+using West.TelegramBot.CodeWatcher.Service;
 
 namespace West.TelegramBot.CodeWatcher;
 
 public class Handler : BotEventHandler
 {
     private readonly ConcurrentBag<DeleteRequest> _requests;
+    private readonly CodeWatcherMode _mode;
+    private readonly IHasteService _haste;
 
-    public Handler(ConcurrentBag<DeleteRequest> requests)
+    public Handler(ConcurrentBag<DeleteRequest> requests, CodeWatcherMode mode, IHasteService haste)
     {
         _requests = requests;
+        _mode = mode;
+        _haste = haste;
     }
 
     [Update(InChat.Public, UpdateFlag.Message | UpdateFlag.EditedMessage)]
@@ -35,7 +41,6 @@ public class Handler : BotEventHandler
             return;
         }
 
-
         if (!await Bot.CanDeleteMessagesAsync(Chat))
         {
             return;
@@ -69,14 +74,43 @@ public class Handler : BotEventHandler
 
                 if (entityLines.Count >= 20 || entityLines.Any(line => line.Length > 160))
                 {
-                    await DeleteAndNotifyAsync(message);
+                    await ProcessDetectedCode(message);
                     return;
                 }
             }
         }
     }
 
-    public async Task DeleteAndNotifyAsync(Message message)
+    public async Task ProcessDetectedCode(Message message)
+    {
+        switch (await _mode.GetValueAsync(Chat.Id))
+        {
+            case "disabled":
+                return;
+            
+            case "remove":
+                await RemoveDetectedCode(message);
+                break;
+            
+            case "upload":
+                await UploadDetectedCode(message);
+                break;
+
+        }
+    }
+
+    public async Task UploadDetectedCode(Message message)
+    {
+        var resp = await _haste.PostDocumentAsync(message.Text!);
+        await Bot.DeleteMessageAsync(Chat.Id, message.MessageId);
+       
+        await Bot.SendTextMessageAsync(Chat.Id, 
+            $"{message.From?.ToHtml()}, you posted something long and pre-escaped, so I decided to upload it to our paste service for you.\n" +
+            $"Here is the link: {_haste.GetHasteUri() + resp.Key}",
+            parseMode: ParseMode.Html);
+    }
+
+    public async Task RemoveDetectedCode(Message message)
     {
         await Bot.DeleteMessageAsync(Chat.Id, message.MessageId);
         var notifyMsg = await Bot.SendTextMessageAsync(Chat.Id,